CVE-2025-59259

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 74.0% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-10-14 17:00Z1 YR AGO

Last updated

2026-02-22 17:24Z8 MO AGO

Reserved

2025-09-11

Assigning CNA

microsoft

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

Weaknesses

• CWE-1287Improper Validation of Specified Type of InputBase

Data version

5.2

Document digest

564e0e73718568b1a9d50d39ad29ac34b13cbc6c2ad571b55156d169da2ac9d9

• msrc.microsoft.comWindows Local Session Manager (LSM) Denial of Service Vulnerabilityhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59259vendor-advisorypatch